添加酶制剂对西藏地区青稞秸秆和黑麦草混合青贮效果的影响  

Effect of Adding Cornzyme on Fermentation and Nutritive Quality of Mixed Silage of Hullessbarley Straw and Perennial Ryegrass in Tibet

作　　者：原现军[1,2] 闻爱友[1,3] 郭刚[1] 邵涛[1] 

机构地区：[1]南京农业大学动物科学技术学院饲草调制加工与贮藏研究所,南京210095 [2]上海市农业科学院畜牧兽医研究所,上海201106 [3]安徽科技学院动物科学学院,凤阳233100

出　　处：《畜牧兽医学报》2013年第8期1269-1276,共8页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家科技支撑计划(2010BAE00739-03);西藏主要农作物秸秆与栽培牧草混合青贮关键技术研究资助(XZ20093ZD)

摘　　要：旨在探讨改善西藏地区青稞秸秆和多年生黑麦草混合青贮发酵品质和营养价值的措施,以进一步提高西藏地区秸秆资源的利用效率。将青稞(Hordeum vulgare)秸秆与多年生黑麦草(Lolium perenne)以6:4混合,分别添加0、1.5、2.0和2.5mL·kg-1的酶制剂,青贮后第7、14、30和60天取样分析,评定青贮饲料发酵品质及营养价值。添加酶制剂改善了混合青贮发酵品质,显著提高了乳酸含量和乳酸/乙酸值(P<0.05),显著降低了pH和氨态氮/总氮(P<0.05),抑制了乙酸、丙酸和丁酸的产生。青贮60d后酶添加组氨态氮/总氮为对照组的1/2,而水溶性碳水化合物(WSC)含量为对照组的2倍,且酶添加组有较高的粗蛋白含量和较低的中性洗涤纤维含量。从长期保存和营养价值考虑,将青稞秸秆与黑麦草混合(6∶4)并添加酶制剂青贮利于长期保存。The study aimed to improve the fermentation characteristics and nutritive quality of mixed silage of hullessbarley straw and perennial ryegrass in Tibet,and enhance the utilization efficiency of straw resource in Tibet.Mixture of hullessbarley straw and perennial ryegrass（6︰4） were ensiled with Cornzyme at four levels（0,1.5,2.0 or 2.5 mL·kg-1 of fresh weight）.Triplicate silos per treatment were opened on 7,14,30 and 60 days after ensiling,respectively,the fermentation characteristics and in vitro degradability of silages was analyzed.Cornzyme addition significantly improved the fermentation quality of mixed silages,indicated by higher（P0.05） lactic/acetic acid,lactic acid and water soluble carbohydrate content,and lower（P0.05） pH value and ammonia/total N（AN/TN） than that of the control silage.The pH value of Cornzyme addition silages maintained to about 4.0,which inhibited the production of acetic acid,propionic acid and butyric acid.After 60 days of ensiling,AN/TN in Cornzyme addition silages were half of that in control,but WSC content were double of that in control.The contents of crude protein were higher and neutral detergent fiber were lower in Cornzyme addition silages.These results suggest that adding Cornzyme to mixture of hullessbarley straw and perennial ryegrass at ensiling appears to be a feasible strategy to improve the fermentation and nutritive quality of straw-grass silages.

关 键 词：酶制剂 青稞秸秆 多年生黑麦草 发酵品质 营养价值 

分 类 号：S816.53[农业科学—饲料科学]